RSA私钥加密

        /// <summary>
        /// RSA私钥加密
        /// </summary>
        /// <param name="strValue">待加密的文本</param>
        /// <param name="prkKey">私钥</param>
        /// <returns></returns>
        private string EncryptDataBytes(string strValue,string priKey)
        {
            if (string.IsNullOrEmpty(priKey))
            {
                return "";
            }
            try
            {
                RSACryptoServiceProvider.UseMachineKeyStore = true;
                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
                //私钥
                RSA.FromXmlString(priKey);
                byte[] signData = rsa.SignData(Encoding.UTF8.GetBytes(strValue), CryptoConfig.MapNameToOID("SHA1"));
                return Convert.ToBase64String(signData);
            }
            catch (Exception ex)
            {
                log.Warn(ex.Message);
                return "";
            }
        }